Pilz PMCprimo DriveP.01/AA0/4/0/0/208-480VAC - Manual (Page 18)

Function description
Operating Manual PMCprotego S1­2(­C)
1002528­EN­02 18
} “1” signal (+24 V) at the output:
– Output is low impedance
– Current is supplied to the load
– Safety function activated
Supply voltage
} 24 VDC connection to supply the safety card's digital outputs
4.2.2.2 Dual­pole outputs
The safety card has a safe dual­pole output to control a mechanical brake:
} SBC+/SBC­
Signals at the output
} “0” signal (0 V) at the output (SBC+/SBC­):
– Output is high impedance
– No current to the load
– Safety function is activated, brake closed
} “1” signal (+24 V) at the output (SBC+/SBC­):
– Output is low impedance
– Current is supplied to the load
– Safety function is not activated, brake open
NOTICE
Only a brake which operates in accordance with the failsafe principle may
be connected.
Supply voltage
} 24 VDC connection to supply the safety card's digital outputs
4.2.2.3 Output test
The outputs are tested regularly:
} Outputs that are switched on are checked via regular off tests.
– Test pulses for outputs that are switched on: see technical details
– Outputs that are switched on are switched off for the duration of the test pulse.
– The load must not switch off because of the test.
} Outputs that are switched off are checked via regular on tests.
– Test pulses for outputs that are switched off: see technical details
– Outputs that are switched off are switched on for the duration of the test pulse.
– The load must not switch on because of the test.
Testing for shorts
} A test is regularly carried out to check for shorts between the outputs.